Allison Lake Reservoir Report
Nearby: Mckinnon Burns Lake
Last Updated: December 13, 2025
Located in Marshall, Tennessee, Allison Lake, also known as Lewis Lake Dam, is a private fish and wildlife pond designed by the USDA NRCS and completed in 1971.
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Summary
This Earth dam stands at a structural height of 25 feet with a hydraulic height of 20 feet and has a storage capacity of 66 acre-feet. The dam serves the primary purpose of supporting fish and wildlife habitats while also providing recreational opportunities for visitors.
The dam is situated on the East Fork Bradshaw Creek and is not regulated or inspected by the state. With a significant hazard potential and a moderate risk assessment rating, the dam has not been officially assessed for its condition. Despite this, the dam remains a popular destination for water resource and climate enthusiasts, offering a serene environment for wildlife observation and outdoor activities. With its uncontrolled spillway and rock and soil foundations, Allison Lake is a unique and valuable asset to the local ecosystem.
While the dam does not have associated structures and is not owned by a federal agency, it continues to be a focal point for conservation efforts in the area. The Nashville District oversees the dam's operations, ensuring that it remains a safe and sustainable resource for both wildlife and visitors. For those interested in water resource management and climate conservation, Allison Lake represents a harmonious blend of human ingenuity and environmental stewardship, making it a must-visit destination for enthusiasts in the field.
Year Completed |
1971 |
Dam Length |
275 |
River Or Stream |
EAST FORK BRADSHAW CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
20 |
Drainage Area |
0.1 |
Nid Storage |
66 |
Structural Height |
25 |
Outlet Gates |
None |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cane Creek Near Howell
|
0cfs |
Big Rock Cr At Double Bridges
|
3cfs |
Fountain Creek Near Fountain Heights
|
3cfs |
Elk River Above Fayetteville
|
1690cfs |
Duck River Above Milltown
|
627cfs |
Elk River At Prospect
|
2470cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Allison Lake